cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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virtual_link_encoder.c (4590B)

      1/*
      2 * Copyright 2012-15 Advanced Micro Devices, Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: AMD
     23 *
     24 */
     25
     26#include <linux/slab.h>
     27
     28#include "dm_services.h"
     29#include "dm_services_types.h"
     30
     31#include "virtual_link_encoder.h"
     32
     33static bool virtual_link_encoder_validate_output_with_stream(
     34	struct link_encoder *enc,
     35	const struct dc_stream_state *stream) { return true; }
     36
     37static void virtual_link_encoder_hw_init(struct link_encoder *enc) {}
     38
     39static void virtual_link_encoder_setup(
     40	struct link_encoder *enc,
     41	enum signal_type signal) {}
     42
     43static void virtual_link_encoder_enable_tmds_output(
     44	struct link_encoder *enc,
     45	enum clock_source_id clock_source,
     46	enum dc_color_depth color_depth,
     47	enum signal_type signal,
     48	uint32_t pixel_clock) {}
     49
     50static void virtual_link_encoder_enable_dp_output(
     51	struct link_encoder *enc,
     52	const struct dc_link_settings *link_settings,
     53	enum clock_source_id clock_source) {}
     54
     55static void virtual_link_encoder_enable_dp_mst_output(
     56	struct link_encoder *enc,
     57	const struct dc_link_settings *link_settings,
     58	enum clock_source_id clock_source) {}
     59
     60static void virtual_link_encoder_disable_output(
     61	struct link_encoder *link_enc,
     62	enum signal_type signal) {}
     63
     64static void virtual_link_encoder_dp_set_lane_settings(
     65	struct link_encoder *enc,
     66	const struct dc_link_settings *link_settings,
     67	const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX]) {}
     68
     69static void virtual_link_encoder_dp_set_phy_pattern(
     70	struct link_encoder *enc,
     71	const struct encoder_set_dp_phy_pattern_param *param) {}
     72
     73static void virtual_link_encoder_update_mst_stream_allocation_table(
     74	struct link_encoder *enc,
     75	const struct link_mst_stream_allocation_table *table) {}
     76
     77static void virtual_link_encoder_connect_dig_be_to_fe(
     78	struct link_encoder *enc,
     79	enum engine_id engine,
     80	bool connect) {}
     81
     82static void virtual_link_encoder_destroy(struct link_encoder **enc)
     83{
     84	kfree(*enc);
     85	*enc = NULL;
     86}
     87
     88static void virtual_link_encoder_get_max_link_cap(struct link_encoder *enc,
     89		struct dc_link_settings *link_settings)
     90{
     91	/* Set Default link settings */
     92	struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH,
     93				LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0};
     94	*link_settings = max_link_cap;
     95}
     96
     97static const struct link_encoder_funcs virtual_lnk_enc_funcs = {
     98	.validate_output_with_stream =
     99		virtual_link_encoder_validate_output_with_stream,
    100	.hw_init = virtual_link_encoder_hw_init,
    101	.setup = virtual_link_encoder_setup,
    102	.enable_tmds_output = virtual_link_encoder_enable_tmds_output,
    103	.enable_dp_output = virtual_link_encoder_enable_dp_output,
    104	.enable_dp_mst_output = virtual_link_encoder_enable_dp_mst_output,
    105	.disable_output = virtual_link_encoder_disable_output,
    106	.get_max_link_cap = virtual_link_encoder_get_max_link_cap,
    107	.dp_set_lane_settings = virtual_link_encoder_dp_set_lane_settings,
    108	.dp_set_phy_pattern = virtual_link_encoder_dp_set_phy_pattern,
    109	.update_mst_stream_allocation_table =
    110		virtual_link_encoder_update_mst_stream_allocation_table,
    111	.connect_dig_be_to_fe = virtual_link_encoder_connect_dig_be_to_fe,
    112	.destroy = virtual_link_encoder_destroy
    113};
    114
    115bool virtual_link_encoder_construct(
    116	struct link_encoder *enc, const struct encoder_init_data *init_data)
    117{
    118	enc->funcs = &virtual_lnk_enc_funcs;
    119	enc->ctx = init_data->ctx;
    120	enc->id = init_data->encoder;
    121
    122	enc->hpd_source = init_data->hpd_source;
    123	enc->connector = init_data->connector;
    124
    125	enc->transmitter = init_data->transmitter;
    126
    127	enc->output_signals = SIGNAL_TYPE_VIRTUAL;
    128
    129	enc->preferred_engine = ENGINE_ID_VIRTUAL;
    130
    131	return true;
    132}
    133
    134